The mean cost for the replacement of these brake pads for four different vehicles is equal to $148.75.
A mean can be defined as a terminology that is used to connote a ratio of the sum of the total number of a data set to the frequency of the data set.
Mathematically, the mean cost for the replacement of these brake pads for four different vehicles would be calculated as follows:
Mean cost = [120 + 235 + 98 + 142]/4
Mean cost = 595/4
Mean cost = $148.75.
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